S. Yamauchi et al., NEW TRANSIENT-X-RAY SOURCE IN THE SCUTUM REGION DISCOVERED WITH ASCA, Publications of the Astronomical Society of Japan, 47(2), 1995, pp. 189-194
Using the ASCA satellite we have discovered a new transient X-ray sour
ce at the position of RA(2000)= 18(h)45(m)2(s), Dec(2000) = -4 degrees
33'31'' (uncertainty = 1'), designated as AX 1845.0-0433. The NH-corr
ected X-ray flux was similar to 3 x 10(-12) erg s(-1) cm(-2) in the 0.
7-10 keV region at the beginning of the observation; the X-ray source
then suddenly flared up to a level of about 1 x 10(-9) erg s(-1) cm(-2
) in the 0.7-10 keV region after N-H-correction within less than a few
hours. It exhibited flare-like activity on the minimum time scale of
a few ten minutes; the activity lasted until the end of the observatio
n. The X-ray spectra in the quiescent and flare states resemble those
of binary X-ray pulsars. However, no coherent pulsation was found in t
he range from 125 ms to 4096 s.